The theoretical aspects of a new type of piezo-resistive pressure
sensors for environments with rapidly changing temperatures are
presented. The idea is that the sensor has two identical diaphragms
which have different coefficients of linear thermal expansion.
Therefore, when measuring pressure in environments with variable
temperature, the diaphragms will have different deflection. This
difference can be used to make appropriate correction of the sensor
output signal and, thus, to increase accuracy of measurement. Since
physical principles of sensors operation enable fast correction of the
output signal, the sensor can be used in environments with rapidly
changing temperature, which is its essential advantage. The paper
presents practical implementation of the proposed theoretical aspects
and the results of testing the developed sensor.